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Maximum Disparity with Acuvue Bifocal Contact Lenses with Changes in Illumination

2002; Lippincott Williams & Wilkins; Volume: 79; Issue: 3 Linguagem: Inglês

10.1097/00006324-200203000-00011

1538-9235

José R. Jiménez, JUAN J. DURBAN, Rosario G. Anera,

Urban Green Space and Health

Purpose. To assess the visual performance of Acuvue bifocal contact lenses at different illumination levels using a stereoscopic parameter, the maximum disparity. We compare the results with those for progressive spectacle lenses. Methods. We used a modified Wheatstone stereoscope and random-dot stereograms (RDS) as tests. The maximum disparity was measured for each observer at different luminance levels. Results. Maximum disparities did not show statistically significant differences for a wide range of luminance levels with contact lenses. The maximum disparities found when some contact-lens users wore progressive spectacle lenses were similar. Conclusions. The results show that the Acuvue bifocal lenses offer good performance for a near visual task, in this case the maximum disparity, for changes in illumination and are similar to that with progressive spectacle lenses.